I am not talking about swimming in mud. Just a damp trail or even wet pavement - and some modest speed - and the front tire function switches from steering the bike to throwing mud precisely directed at the rider's face.
Without protective gear, the mud and gravel projectiles hit the eyes at unpredictable moments and the chance of loss of steering is significant.
With clear sunglasses, the lens become stained in a couple of minutes and impair vision. I am reluctant to brush them with my glove as I reckon this would:
- be not very effective, only transforming the mud droplets into a solid film of mud and sand
- scratch the lens badly after several tens of scrapes.
How do downhill riders cope with this? Does the full-face helmet protect the mask in some way? Do they apply anti-water coating on the mask? Do they install some hardy front fender? Or do they just live with it?
In the 2011 Megavelanche, the guy has the camera behind his mask. It got only several drops of dirty water during the entire race, regardless of him riding through snow, mud, water, dirt, gravel. How is this possible, and why do my glasses look like shit when I am touring over asphalt and it rained yesterday?